After Transmigrating into a Book, My Archrival Took Me to the Top

[Two female leads, transmigration into a book, happy ending, a touch of a System, mutual devotion, a hint of yandere behavior later on]

A seemingly gentle but actually strong-willed, sharp-tongued talisman cultivator × a cool on the outside, warm on the inside, gentle alchemist

Yun Wangchen accidentally transmigrated into a nameless female side character in a badly concluded novel, destined to be killed by the male lead with a single blow right from the start. To her surprise, her nemesis Jiang Shuyue transmigrated into the story too, becoming her senior sister.

Yun Wangchen assumed the two of them wouldn't have much to do with each other, but she kept “running into” Jiang Shuyue in every corner of the Six Realms.

Jiang Shuyue: Your hairpin looks lovely today.

Yun Wangchen: ...

Jiang Shuyue: I'll practice swordplay with you today.

Yun Wangchen: ...

Jiang Shuyue: Wangchen, I made these pills for you...

Yun Wangchen: That's enough. We should keep our distance.

Jiang Shuyue: A-Chen, are you in a bad mood? Did the male lead upset you?

The next day, the novel's male lead showed up with a bruised and swollen face, too angry to speak up.

Yun Wangchen: Jiang Shuyue! Don't forget, we're nemeses!

Seeing Jiang Shuyue's hurt expression, Yun Wangchen began to wonder if she was being a little unreasonable, without noticing the smile at the corner of Jiang Shuyue's mouth.

“Don't worry. With me here, I'll make sure you become the greatest in the Six Realms.”